Which moulding technique forces a powdered polymer into a cavity using heat?

The technique that forces a powdered polymer into a cavity using heat is transfer moulding. This process involves placing a pre-measured amount of polymer (often in powder form) into a heated chamber or pot, where it is then melted. The molten material is subsequently forced into a mould cavity through a system of channels using a plunger. The application of heat is crucial as it facilitates the melting of the polymer, allowing it to flow into the intricate details of the mould before it cools and solidifies into the desired shape.

Each moulding technique has its unique advantages and applications, and transfer moulding is particularly useful for making complex parts with high-quality finishes, especially those that require greater control over the material flow and properties. This differentiation is important as it highlights the specific role of temperature and pressure in shaping materials, which can vary significantly among different moulding methods.